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MathGroup Archive 2004

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Plotting an implicit function

  • To: mathgroup at smc.vnet.net
  • Subject: [mg50559] Plotting an implicit function
  • From: david.friskin at upe.ac.za (David Friskin)
  • Date: Fri, 10 Sep 2004 04:05:59 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

I have the following implicit function:
f[r, M]=1 + (-1 - 0.03*M^2 + 
    1.2*M)*r - (0.05*E^(r*M)/r - 0.05/r + E^(r*M)*(1 - 0.05*M))==0

where r is a function of M i.e. r(M).

I would like to plot r(M) vs M, for {M,0,20}.

I tried using
 ImplicitPlot[{f[r,M] == 0},{M,0,20}], but Solve is having problems
finding the roots to my function.

Could someone help me with the code to do this, perhaps using FindRoot
somehow?

Thanks
David

P.S. r > 0


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